US PATENT SUBCLASS 423 / 252
.~ Thorium compound

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

249  DF  RADIOACTIVE (AT. NO. 84+ OR RADIOACTIVE ISOTOPE OF ANOTHER ELEMENT) {3}
252.~ Thorium compound

DEFINITION

Classification: 423/252

(under subclass 249) Products or processes in which the compound comprises thorium.